Surgery – Controlled release therapeutic device or system – Osmotic or diffusion pumped device or system
Patent
1991-07-30
1993-07-13
Thaler, Michael H.
Surgery
Controlled release therapeutic device or system
Osmotic or diffusion pumped device or system
6048911, 424457, 424422, 514965, A61K 922
Patent
active
052269027
ABSTRACT:
A device for the dispensing of a biologically active material into the surrounding environment is disclosed which consists of at least one wall enclosing a compartment which contains a swollen stimuli sensitive hydrogel in which the biologically active material is entrained in solution. The hydrogel deswells or shrinks in response to contact by external physical or chemical stimuli releasing the biologically active material into the portion of the compartment previously occupied by the swollen hydrogel. The wall enclosing the compartment is rigid and contains means allowing the passage of the biologically active material from the compartment to the surrounding environment and also for transmitting the external stimuli to the swollen hydrogel in said compartment. The wall may contain orifices or be permeable to the active material and external stimuli depending upon the drug and the stimuli to be used. The hydrogel reversibly deswells, shrinks or contracts in response to stimuli, such as temperature, pH, ionic strength, glucose concentration or metabolites in the body and then reswells and reentrains active material not diffused from the compartment when the stimuli is removed. The wall may consist of one or more layers which, in combination, provide for the expeditious delivery of the active substance either through permeation through the wall or through orifices in the wall and also for the conducting of the external stimuli through the wall into the compartment to trigger the deswelling of the hydrogel.
REFERENCES:
patent: 3710795 (1973-01-01), Higuchi et al.
patent: 3994799 (1976-11-01), Yao et al.
patent: 4034756 (1977-07-01), Higuchi et al.
patent: 4203440 (1980-05-01), Theeuwes
patent: 4320759 (1982-03-01), Theeuwes
patent: 4351337 (1982-09-01), Sidman
patent: 4503030 (1985-03-01), Edgren et al.
patent: 4627850 (1986-12-01), Deters et al.
patent: 4717566 (1988-01-01), Eckenhoff et al.
patent: 4743247 (1988-05-01), Wong
patent: 4743248 (1988-05-01), Bartoo et al.
patent: 4783337 (1988-11-01), Wong et al.
patent: 4814180 (1989-03-01), Eckenhoff et al.
patent: 4837111 (1989-06-01), Deters et al.
patent: 4849226 (1989-07-01), Gale
patent: 4865598 (1989-09-01), Eckenhoff
patent: 4871544 (1989-10-01), Eckenhoff
patent: 4883667 (1989-11-01), Eckenhoff
patent: 4948592 (1990-08-01), Ayer et al.
patent: 4955881 (1990-09-01), Eckenhoff
patent: 4957494 (1990-09-01), Wong et al.
patent: 4966767 (1990-10-01), Eckenhoff
patent: 5108756 (1992-04-01), Curatolo
Bae et al., "Thermo-sensitive polymers as on-off switches for drug release", Makromol. Chem., Rapid Commun. 8, 481-485 (1987).
Thermally Reversible Hydrogels: II Delivery and Selective Removal of Substances from Aqueous Solutions, Journal of Controlled Release (1986 Elsevier Science Publishers B.V.) 4 (1986) 213-222.
Temperature Responsive Controlled Drug Delivery, Chapter 2, Pulsed and Self Regulated Drug Delivery, Okano et al.
Chemically Self-Regulated Drug Delivery Systems, Journal of Controlled Release 8 (1988) 111-125.
Bae You H.
Kim Sung W.
Valuev Lev I.
Polutta Mark O.
Thaler Michael H.
University of Utah
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